process.Exited += new EventHandler(Process_OnExit);


void Process_OnExit(object sender, System.EventArgs e)
{
                Process curr  = (Process)sender;
                curr.StartInfo.FileName = processPath;
                curr.StartInfo.UseShellExecute = true;
                curr.Start()
}

------解决方案--------------------
processPath = process.MainModule.FileName;

少写了一句话

------解决方案--------------------
学习了